| Recent years, with the improve of human living conditions and thechange of human's food and drink habits ,the diabetic diseases has been asevere threaten to the human health and its disease incidence keep increasing .There are lots of complications in diabetic diseases. Diabetic retinopathyis one of severe complications. And diabetic macular edema is the a ofdiabetic retinopathy. At the same time diabetic macular edema is one of themost important factors that affect the acuity of vision of DR patients. To havea thorough understand to diabetic macular edema caused by diabetic diseases.We made a retrospective analysis about related informations of 151 DRpatients diagnosed by FFA and OCT in our out-patient clinic fromOctober,2005 to March,2006.Many scholars had made lots of detailed studieson the relationships among the classification of diabetic macular edema,the stages of diabetic retinopathy, the course of diabetic disease and visualloss. At present, they mainly judge the extent of macular edema by FFA. FFAis a qualitation method but not a quantitation one, it can not judge the extentof macular edema by the precise data. With the widely use of OCT in clinic,we got a more precise and objective method to judge the extent of macularedema. OCT is a new technique based on lights interfere theory to checkliving being tissue and show the tissue structure. So OCT can preciselymeasure the height of macular .The method of my experiment is to use OCTto check the macular of DR patients and classify the results ,then analyse thedata by statistics and analysis the relationships among The classification ofdiabetic macular edema, the stages of diabetic retinopathy, the course ofdiabetic disease and visual loss.The clinical data of FFA and optical coherence tomography OCT, thecourse of diabetic disease and visual information of 151 patients (288eyes)with DR were analyzed retrospectively. DR was classified according to thestandard of the diagnosis and classification constituted in 1984, and DME wasclassified according to the standard made by Tongren hospital. The analysiswas carried out about the relationships among the classification of diabeticmacular edema, the stages of diabetic retinopathy, the course of diabeticdisease and visual loss.The Results show that in 151 patients (288eyes), 99 eyes had DME(34.38%) ,including 54 eyes (54.55%) with low-grade DME, 24 eyes (24.24%)with midrange DME, 21 eyes (21.21%) with severe edema. The occurrence ofDME was 10.10% in stage I, 8.08% in stage Ⅱ , 40.40%in stage Ⅲ , 41.41%in stage Ⅳ, and because of occurrence of syndrome such as cataract,proliferation of retina vitreous hemorrhage, it is hard to find DME in stageⅤ,Ⅵ DR. The DME mainly happened during the period of time 5-20 yearsfor the DR patients. Our study shows that the occurrence of DME were 8%when patents' course were less than 5 years, 20.1% in the 6-10 years, 28.3%in the 11-15 years,38.4% in the 16-20 years, and 4% when patents' coursewere more than 20 years. The visual loss of DME: 17.1% in <0.1, 26.4%in≥0.1~<0.4 , 22.2%in ≥0.4~<0.7, 9.1%in≥0.7~<1.0 and9.1% in ≥1.0.So we reached the conclusions that DME is the main cause of visualimpairment of DR. Along with the development of DME, the vision lossincreases. Along with the increases of course, the incidence of DME increases,and the severity of DME aggravated. The development of DME has definitecorrespondence with the development of DR, but they have no strictcorrespondence in the chronological order with the standard of the diagnosisand classification constituted in 1984. |
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